Self-adaptive excitation control system based on plasma synthetic jet actuator

Abstract

The invention relates to a self-adaptive excitation control system based on a plasma synthetic jet actuator. The system comprises a plasma synthetic jet actuator, an outer wall face pressure sensor, an intracavity pressure sensor, a computer, a high-voltage power supply, a high-pressure gas source and an airflow valve. The system is characterized in that the excitation efficacy of the plasma synthetic jet actuator can be adaptively adjusted according to the situation of an external flow field. The system has wide application range and high response speed, can be used for better mining the excitation efficacy of the plasma synthetic jet actuator, and realizes optimized positive flowing control for the external flow field.

Description

technical field [0001] The invention relates to a control system, which is an adaptive and high-efficiency jet system for controlling the airflow direction of an external flow field. The system belongs to the technical field of aerodynamic active flow control. technical background [0002] Combining the advantages of partial arc filament discharge plasma actuators and synthetic jet actuators, the Johns Hopkins University Applied Physics Laboratory proposed a plasma synthetic jet actuator in 2003. The exciter has the advantages of simple structure, quick response, convenient adjustment of parameters, strong pneumatic excitation and the like. Its an excitation cycle can be divided into energy deposition stage, jet ejection stage and inhalation recovery stage. The time of the first two stages is only a few tens of microseconds, and the last stage occupies most of the time in an incentive cycle. In the normal pressure and low velocity flow field, the flow control performance o...

AI Technical Summary

Problems solved by technology

This leads to the exciter close to the negative pressure suction, the single suction volume is continuously reduced, resulting in the obvious insufficient excitation strength of the exciter in the later stage of excitation, which cannot meet the flow control requirements

Finally, in high-altitude applications, the surrounding gas is thin, and although it is easier to discharge between electrodes, the jet mass flow rate of a single injection is too low, and the aerodynamic excitation intensity is not enough to meet the requirements of active flow control

Therefore, in the case of high frequency, low pressure, and long-term excitation, the plasma synthetic jet actuator will not work normally, and the aerodynamic excitation generated by it cannot meet the requirements of active flow control

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